Driving-wheel for motor-vehicles.



PATENTED DEC. 5; 1905.

0. s. BAULD. v DRIVING WHEEL FOR MOTOR VEHICLES.

APPLICATION FILED MAY3, 1905.

3 SHEETSSHEET 1.

Figl,

No. 806,452. 'PATEN'IED DEC. 5, 1905.

G.S.BAULD. DRIVING WHEEL FOR MOTOR VEHICLES.

APPLICATION FILED MAY 3, 1905.

3 SHEETS-SHEET 2.

No. 806,452. PATENTED 1mg. 5,1905.

c, SQIBAULD.

nmvme' WHEEL FOR MOTOR VEHICLES.

APPLIOA'l'IOK FILED HAY 3, 1905.

3 BHBBTS-SHIEET 3.

v L I v fwezztor J T alljwhom it may concern:

. UNITED STATES QCHARLESSARSFIELD BAULD, OF'LATROBE. TASMANIA, AUSTRALIA. As-

SIGNOR; OF ONE-HALF TO ALFRED CHRISTIAN TASMANIA, AUSTRALIA.

PATENT. OFFICE.

DRIVING-WHEEL- Fon MOTOR-VEHICLES.

: l Specification of Letters Patent.

' Patented Dec. 5, 1905.

Application filed May 3, 1905. .Scrial No. 258,597.

Be' it known that 1, CHARLES SARsFIn p BAULD, a subject of the King of Great Britain and Ireland, residing at Latrobe, in the State of Tasmania, Commonwealth of Australia, have invented certain new and useful Improvements in the Driving-Wheels of Motor? Cycles, Automobiles, and other Self-Propelled Vehicles,- of which the following is a specification. v I v The object of this invention is to prevent damage that may be caused to the tire of the driving-wheels of motor-cycles, automobiles, or other self-propelled vehicles,or other parts of the vehicles, when a sudden increase of speed is imparted by theengine and the loss of power that may be caused through the belt slipping; also, .to lessen the strain on the engine, thusmaking itpossible to secure better results from it.

' Further objects of the invention are to minimize the jolt caused by the wheels passing over uneven ground and to facilitate the mounting of hills.

The invention is also designed to act as an intermediate gear, receiving the rapid movements of the engine and imparting to the driving-wheel a suitable speed.

In the drawings hereto annexed I have shown my invention applied to the drivingwheel of a motor-cycle; but, as will be obvious, itis equally applicable to automobiles or other self-propelled vehicles.

Referring now to the drawings, in which the same reference-numerals are used to designate the same parts wherever they occur. Figure 1 is a side elevation of the driving-wheel of a motor-cycle embodying my invention. Fig. 2 is a side elevation of the hub in section. Fig. 3 is a vertical section of the hub on the line a a, Fig. 1; and Fig.4 is a side elevation of the framework of the-hub. Figs.

3 and 4 are drawn on a larger scale than Figs. 1 and 2. i

1 is the tire of the wheel; 2, the rim; 3, the spokes, and 4 the hub. Said hub is hollow and is fitted with cogs 5 on its inner or concave surface. On each side of the cogs5 and at the outside ends of the hub 4 are smooth surfaces 6 6.

7 isa spindle.

8 is a pinion which runs on ball-bearings and cones fitted to the spindle 7 in the usual gaged with said cogs. "number of cogson the pinion tothose on the manner. The cogs 9 of the pinion 8 gear into and are of the same length asthe cogs 5 on the hub4. The pinion 8 at each end of the cogs 9 is of larger'diameter than the cogs and stands above the level of the said cogs and bears against thesmooth surfaces6 6 on either side of the cogs 5 when the pinion 8 isen- The proportion of the hub is about one to five or six.

The ends of the pinion 8 are turned down to form cones10 10, which run on balls 11 in the cups 12 12, screwed into the lower portion DEHLE, OF HOBART,

15 1501' the framework .13. Said framework is constructed of four pieces14 14 15 15. The two upper portions 14 14 are made in the form of a T, and to that portion which constitutes the leg thereof and carries the slot 16 are fixed by means of bolts straight pieces of iron 15 15 of similar size to that used in the construction of 14 14. Said slots 16 16 are for the purpose of varying the adjustment of the framework 13 in the hub 4. Passing through the ends of the arms of the upper portion 14 14 of the framework are two spindles 17 17 each carrying two rollers 18 18. Said rollers run on the smooth surfaces 6 6 of the hub 4. The .two sides of the framework 13 are securely fastened together by means of the stay 19.

Fitted rigidly to those portions of the pinion 8 that project outwardly through the cups 12 12 are sprocket-wheels 20 20, one of which is connected with the engine and the other with the pedals by the usual gear-chains.

The sprocket-wheelon the engine may be of the same gear as that on the driving-wheel.

The forks 'of the bicycle are attached to the spindle 7 in the usual manner.

The mode of operation is as follows: Motion is given to the driving-wheel by the ac tion of the engine, causing the sprocket-wheels 2O 20 (which are attached. to the pinion 8, which gears into the cogs 5 on the inner surface of the hub 4) to revolve. The weight of the vehicle resting on the spindle7 tends to keep the latter at 21, the lowest point of the hub 4, as shown in full lines in Fig. 1. The

revolution of the pinion causes it totravel up the cogs 5 on the inside of the hub 4-, so that it may possibly reach a point about 22 and the rollers on the arms a point about 23 23, .both as shown in dotted lines in Fig. 1. The

normal position of the spindle 7 when the engine is in motion, however, will be about half-way between the two points 21 and 22. It is obvious that the greater the speed of the pinion 8 the higher it will mount the cogs 5. When the spindle 7 moves forward, it will cause its load to rest on a part of the wheel that is forward of the center bearing-line that is, an imaginary line drawn from the center of the wheel to a point where the wheel touches the ground. By this means the load helps to bear the front of the wheel downward, and thus assists to drive the vehicle forward. When mounting hills, the advan tage of the forward position of the spindle will be specially felt, for instead of the load being behind the'center bearing-line, as is the casein vehicles fitted with ordinary hubs when mounting hills, it will be in front of it and will thus render the ascent easier. When the vehicle jolts over uneven ground, the pinion will recede with the jolt, which will thus not be felt by the rider to its full extent. When the engine is being started, the spindle carrying the spindle 8 can advance upward along the cogs 5 of the hub from 21 as the wheel is gathering momentum, and in the event of a sudden increase of the speed of the engine while the vehicle is moving the spindle can advance farther along the wheel from its normal position. In both these cases the shock to the gear or other parts of the vehicle will be avoided or minimized to a great extent and no'power will be lost, as motion will be imparted to the driving-wheel when the spindle is receding from its advanced position.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

The combination with a driving-wheel of a self-propelled vehicle, of a hollow hub t fitted with cogs 5 on its inner surface, said cogs having smooth surfaces 6, 6, on either side thereof, a T-shaped frame, rollers 18 at the ends of the horizontal arm of the T, a spindle 7 carried at the end of the other arm, a pinion 8 loosely mounted on said spindle, said pinion engaging with the cogs 5 and having smooth enlarged portions at each end engaging with the surfaces 6, 6, and toothed wheels 20 mounted on the extended ends of pinion 8 carried on the spindle.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

CHARLES SARSFIELD BAULI).

Witnesses:

LINDSAY TULLOCH, FREDK. RAUTE. 

